MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c898c81963e5d42995469187d71bf0e7231a861d5e5534807a376547bc3c16e5
MD5771e628db941cd2d4287e9f4fa538682
File Typeexe
Size929.0 KB
First Seen2025-10-07
File NameHesap Harakelitiz-pdf.exe
Tagsexe, geo, MassLogger, TUR

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: c898c81963e5d42995469187d71bf0e7231a861d5e5534807a376547bc3c16e5
  • MD5: 771e628db941cd2d4287e9f4fa538682

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Disconnect the system from the network immediately
  2. Yeni bir cihazdan banka hesabı, sosyal medya ve e-posta şifrelerini değiştirin
  3. Move crypto wallets to a new address and abandon the old ones
  4. Start a full scan with up-to-date antivirus
  5. Clear saved browser passwords and enable 2FA
  6. Sign out of all sessions on every affected service

YARA Rule Hints

rule MassLogger_SHA256 {
    meta:
        description = "MassLogger sample: c898c81963e5d429"
        threat_level = "medium"
        first_seen = "2025-10-07"
    condition:
        hash.sha256(0, filesize) == "c898c81963e5d42995469187d71bf0e7231a861d5e5534807a376547bc3c16e5"
}

MassLogger — Malware Profile

MassLogger credential stealer. PT2600000043.js Portekiz fatura lurü. CommonJS obfuscation. dispatch configuration data.

Malware Type
Infostealer
Programming Language
C#/.NET
C2 Protocol
SMTP/FTP
Target Systems
Windows

Capabilities & Behavior

Tarayıcı Kimlik Bilgileri
Çerez Hırsızlığı
Kripto Cüzdan Çalma
Sistem Bilgisi
Ekran Görüntüsü
FTP/SSH İstemci Şifreleri
E-posta İstemcisi Çalma
Veri Sızıntısı

IOC List (2 indicators)

IOC — MassLogger
# SHA256 c898c81963e5d42995469187d71bf0e7231a861d5e5534807a376547bc3c16e5 # MD5 771e628db941cd2d4287e9f4fa538682
TypeValueNote
sha256 c898c81963e5d42995469187d71bf0e7231a861d5e5534807a376547bc3c16e5 Sample:MassLogger
md5 771e628db941cd2d4287e9f4fa538682 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi